Finding extended homes…
These only choose where you start. Every page and every lens is still one tap away.
Sign in to keep them on every device →Finding extended homes…
Homes within 1 km whose energy certificates show the floor area growing: extensions, loft and garage conversions. Tap a home on the map or in the list for its full history. Back to CF11 9NJ
Not every extension shows here. We only see building work when a new energy certificate is lodged, which happens when a home is sold, let or newly built. A loft or extension added since then won't appear, even with planning permission and building control sign-off, because those records aren't published as open data outside London. Missing work doesn't mean missing paperwork.
| Home | Before | After | Added | Recorded |
|---|---|---|---|---|
| 173, Cathedral Road628 m away | 166 m² | 342 m² | +176 m² +106% | 2016 |
| 93, Cathedral Road592 m away | 116 m² | 280 m² | +164 m² +141% | 2023 |
| 29, Romilly Road West890 m away | 125 m² | 278 m² | +153 m² +122% | 2016 |
| 2a, William Street706 m away | 72 m² | 179 m² | +107 m² +149% | 2022 |
| 184, Lansdowne Road732 m away | 109 m² | 212 m² | +103 m² +94% | 2026 |
| 23, Pontcanna Place694 m away | 78 m² | 175 m² | +97 m² +124% | 2025 |
| 15, Green Street971 m away | 75 m² | 161 m² | +86 m² +115% | 2025 |
| 47, Talbot Street538 m away | 155 m² | 239 m² | +84 m² +54% | 2018 |
| 21, Brunswick Street261 m away |
From energy performance certificates (MHCLG): a later certificate shows at least 15 m² and 15% more floor area than an earlier one (and no more than 2.5 times, to leave out typing errors). Some changes come from a more careful measurement rather than building work. Addresses: HM Land Registry. Contains HM Land Registry data © Crown copyright and database right 2026, OGL v3.0.
| 97 m² |
| 181 m² |
| +84 m² +87% |
| 2014 |
| 28, Broadstairs Road729 m away | 90 m² | 169 m² | +79 m² +88% | 2026 |
|---|
| 34, Broadstairs Road729 m away | 88 m² | 161 m² | +73 m² +83% | 2025 |
|---|
| 30, Broadhaven778 m away | 84 m² | 157 m² | +73 m² +87% | 2023 |
|---|
| 5, Dyfrig Street694 m away | 64 m² | 134 m² | +70 m² +109% | 2008 |
|---|
| 12, Kyveilog Street713 m away | 76 m² | 142 m² | +66 m² +87% | 2019 |
|---|
| 122, Severn Grove588 m away | 128 m² | 193 m² | +65 m² +51% | 2015 |
|---|
| 23, Teilo Street799 m away | 82 m² | 147 m² | +65 m² +79% | 2015 |
|---|
| Cwrt Soffia, 47 - 53, Cathedral Road640 m away | 66 m² | 128 m² | +62 m² +94% | 2008 |
|---|
| 78, Plasturton Avenue575 m away | 74 m² | 135 m² | +61 m² +82% | 2024 |
|---|
| 62, Neville Street914 m away | 65 m² | 123 m² | +58 m² +89% | 2022 |
|---|
| 24, Wells Street559 m away | 178 m² | 236 m² | +58 m² +33% | 2020 |
|---|
| 25a, Neville Street793 m away | 139 m² | 197 m² | +58 m² +42% | 2014 |
|---|
| 22, Surrey Street899 m away | 42 m² | 99 m² | +57 m² +136% | 2015 |
|---|
| 14, St Johns Crescent219 m away | 121 m² | 178 m² | +57 m² +47% | 2012 |
|---|
| 23, York Street510 m away | 74 m² | 128 m² | +54 m² +73% | 2024 |
|---|
| 3, Carmarthen Street276 m away | 79 m² | 132 m² | +53 m² +67% | 2014 |
|---|
| 33, Penhill Road724 m away | 84 m² | 137 m² | +53 m² +63% | 2009 |
|---|
| 66, Neville Street914 m away | 77 m² | 129 m² | +52 m² +68% | 2021 |
|---|
| 29, Lansdowne Road454 m away | 63 m² | 114 m² | +51 m² +81% | 2018 |
|---|
| 127, Llandaff Road347 m away | 122 m² | 172 m² | +50 m² +41% | 2024 |
|---|
| 23, Cae Syr Dafydd609 m away | 70 m² | 120 m² | +50 m² +71% | 2014 |
|---|
| 60, Cathedral Road684 m away | 43 m² | 93 m² | +50 m² +116% | 2013 |
|---|
| 54, Neville Street747 m away | 79 m² | 129 m² | +50 m² +63% | 2008 |
|---|
| 45, Atlas Road439 m away | 177 m² | 226 m² | +49 m² +28% | 2020 |
|---|
| 7, Ryder Street545 m away | 160 m² | 208 m² | +48 m² +30% | 2023 |
|---|
| 1, Berthwin Street724 m away | 61 m² | 109 m² | +48 m² +79% | 2021 |
|---|
| 19, Gileston Road797 m away | 125 m² | 173 m² | +48 m² +38% | 2019 |
|---|
| 31, Craddock Street940 m away | 88 m² | 135 m² | +47 m² +53% | 2024 |
|---|
| 33, Teilo Street799 m away | 156 m² | 202 m² | +46 m² +29% | 2026 |
|---|
| 51, Lansdowne Road454 m away | 83 m² | 129 m² | +46 m² +55% | 2019 |
|---|
| 7, Wembley Road564 m away | 70 m² | 115 m² | +45 m² +64% | 2015 |
|---|
| 13, Forrest Road875 m away | 123 m² | 167 m² | +44 m² +36% | 2020 |
|---|
| 481, Cowbridge Road East767 m away | 55 m² | 99 m² | +44 m² +80% | 2012 |
|---|
| Flat 4, 78, Cathedral Road645 m away | 75 m² | 118 m² | +43 m² +57% | 2023 |
|---|
| 18, Egerton Street563 m away | 75 m² | 118 m² | +43 m² +57% | 2020 |
|---|
| 76, Wyndham Crescent284 m away | 182 m² | 225 m² | +43 m² +24% | 2016 |
|---|
| 42, Plasturton Gardens537 m away | 212 m² | 254 m² | +42 m² +20% | 2025 |
|---|
| 76, Cathedral Road645 m away | 41 m² | 83 m² | +42 m² +102% | 2022 |
|---|
| 63, Heol Terrell933 m away | 113 m² | 155 m² | +42 m² +37% | 2021 |
|---|
| 82, Ninian Park Road766 m away | 67 m² | 108 m² | +41 m² +61% | 2024 |
|---|
| Apartment 8, The Hamilton'S, Cathedral Road744 m away | 67 m² | 108 m² | +41 m² +61% | 2023 |
|---|
| 133, Clive Road925 m away | 47 m² | 88 m² | +41 m² +87% | 2021 |
|---|
| 5, Egerton Street584 m away | 101 m² | 142 m² | +41 m² +41% | 2011 |
|---|
| 21, Wyndham Road311 m away | 91 m² | 130 m² | +39 m² +43% | 2026 |
|---|
| 100, Severn Grove588 m away | 141 m² | 180 m² | +39 m² +28% | 2025 |
|---|
| The Croft, Llandaff Road666 m away | 220 m² | 259 m² | +39 m² +18% | 2021 |
|---|
| 101, Ninian Park Road803 m away | 29 m² | 67 m² | +38 m² +131% | 2020 |
|---|
| 7, Thurston Street475 m away | 61 m² | 99 m² | +38 m² +62% | 2018 |
|---|
| 33, Lansdowne Road454 m away | 77 m² | 115 m² | +38 m² +49% | 2010 |
|---|
| 67, Fairleigh Road865 m away | 95 m² | 132 m² | +37 m² +39% | 2023 |
|---|
| 15, Fields Park Road847 m away | 172 m² | 209 m² | +37 m² +22% | 2022 |
|---|
| 16, Neville Street747 m away | 43 m² | 80 m² | +37 m² +86% | 2009 |
|---|
| 31, Daisy Street886 m away | 66 m² | 102 m² | +36 m² +55% | 2024 |
|---|
| 39, Market Road211 m away | 94 m² | 130 m² | +36 m² +38% | 2022 |
|---|
| 29, Rennie Street649 m away | 93 m² | 129 m² | +36 m² +39% | 2016 |
|---|
| 75, Romilly Crescent351 m away | 150 m² | 186 m² | +36 m² +24% | 2014 |
|---|
| 201, Cathedral Road665 m away | 61 m² | 97 m² | +36 m² +59% | 2014 |
|---|
| 1, Tintern Street532 m away | 66 m² | 102 m² | +36 m² +55% | 2012 |
|---|
| Flat 2, 38, Glamorgan Street261 m away | 43 m² | 79 m² | +36 m² +84% | 2010 |
|---|
| 112, Pembroke Road570 m away | 89 m² | 124 m² | +35 m² +39% | 2024 |
|---|
| 136b, Llandaff Road544 m away | 104 m² | 139 m² | +35 m² +34% | 2019 |
|---|
| 190, Cathedral Road727 m away | 53 m² | 88 m² | +35 m² +66% | 2010 |
|---|
| 13, Fairleigh Road928 m away | 118 m² | 152 m² | +34 m² +29% | 2025 |
|---|
| 63, Clive Road784 m away | 34 m² | 68 m² | +34 m² +100% | 2022 |
|---|
| 29, Plasturton Gardens457 m away | 141 m² | 175 m² | +34 m² +24% | 2021 |
|---|
| 37, Severn Grove506 m away | 48 m² | 82 m² | +34 m² +71% | 2021 |
|---|
| 27, Neville Street793 m away | 193 m² | 227 m² | +34 m² +18% | 2021 |
|---|
| 123, Clive Road857 m away | 113 m² | 147 m² | +34 m² +30% | 2013 |
|---|
| 51, Canton Court413 m away | 50 m² | 83 m² | +33 m² +66% | 2023 |
|---|
| 67, Plasturton Avenue514 m away | 171 m² | 204 m² | +33 m² +19% | 2023 |
|---|
| 1, Leckwith Close752 m away | 63 m² | 96 m² | +33 m² +52% | 2022 |
|---|
| 97, Kings Road377 m away | 149 m² | 182 m² | +33 m² +22% | 2021 |
|---|
| 1a, Teilo Street799 m away | 144 m² | 177 m² | +33 m² +23% | 2020 |
|---|
| 105, Cowbridge Road East751 m away | 96 m² | 129 m² | +33 m² +34% | 2019 |
|---|
| 324, Cowbridge Road East695 m away | 37 m² | 70 m² | +33 m² +89% | 2018 |
|---|
| 68, Cathedral Road684 m away | 42 m² | 75 m² | +33 m² +79% | 2016 |
|---|
| Flat 28, Edinburgh Court, Wyndham Place574 m away | 34 m² | 67 m² | +33 m² +97% | 2013 |
|---|
| 29, Rectory Road337 m away | 46 m² | 79 m² | +33 m² +72% | 2012 |
|---|
| 108, Wyndham Road308 m away | 93 m² | 126 m² | +33 m² +35% | 2011 |
|---|
| 98, Clive Road925 m away | 140 m² | 173 m² | +33 m² +24% | 2010 |
|---|
| 290, Cowbridge Road East589 m away | 46 m² | 79 m² | +33 m² +72% | 2009 |
|---|
| 292, Cowbridge Road East589 m away | 46 m² | 79 m² | +33 m² +72% | 2009 |
|---|
| 6, Hamilton Street593 m away | 134 m² | 167 m² | +33 m² +25% | 2009 |
|---|
| 12, Preswylfa Street758 m away | 93 m² | 125 m² | +32 m² +34% | 2026 |
|---|
| 215, Lansdowne Road804 m away | 59 m² | 91 m² | +32 m² +54% | 2026 |
|---|
| Flat 1, Kings Mews, Kings Road435 m away | 35 m² | 67 m² | +32 m² +91% | 2025 |
|---|
| 29, Wembley Road564 m away | 92 m² | 124 m² | +32 m² +35% | 2025 |
|---|
| Flat 4, 86, Cathedral Road645 m away | 55 m² | 87 m² | +32 m² +58% | 2021 |
|---|
| 10, Vishwell Road987 m away | 97 m² | 129 m² | +32 m² +33% | 2021 |
|---|
| 119, Cathedral Road592 m away | 53 m² | 85 m² | +32 m² +60% | 2020 |
|---|
| 30, Wells Street559 m away | 84 m² | 116 m² | +32 m² +38% | 2014 |
|---|
| 26, De Burgh Street824 m away | 123 m² | 155 m² | +32 m² +26% | 2009 |
|---|
| 35, Pen Y Peel Road383 m away | 82 m² | 113 m² | +31 m² +38% | 2023 |
|---|
| 12, Hamilton Street593 m away | 141 m² | 172 m² | +31 m² +22% | 2022 |
|---|
| 22, Canton Court370 m away | 94 m² | 125 m² | +31 m² +33% | 2014 |
|---|
| 92, Wyndham Crescent284 m away | 57 m² | 88 m² | +31 m² +54% | 2013 |
|---|
| 29, Pontcanna Street502 m away | 122 m² | 152 m² | +30 m² +25% | 2020 |
|---|
| 1, Penhill Road738 m away | 58 m² | 88 m² | +30 m² +52% | 2019 |
|---|
| 106, Clive Road925 m away | 129 m² | 159 m² | +30 m² +23% | 2019 |
|---|
| 41, Kings Road364 m away | 61 m² | 91 m² | +30 m² +49% | 2017 |
|---|
| 31, Hamilton Street593 m away | 130 m² | 160 m² | +30 m² +23% | 2017 |
|---|
| 26, Romilly Road742 m away | 57 m² | 87 m² | +30 m² +53% | 2010 |
|---|
| 9, Wyndham Road311 m away | 91 m² | 120 m² | +29 m² +32% | 2025 |
|---|
| 11, Wyndham Place549 m away | 84 m² | 113 m² | +29 m² +35% | 2022 |
|---|
| 3, Egham Street702 m away | 99 m² | 128 m² | +29 m² +29% | 2022 |
|---|
| 71, Daisy Street983 m away | 58 m² | 87 m² | +29 m² +50% | 2021 |
|---|
| 36, Wyndham Road311 m away | 78 m² | 107 m² | +29 m² +37% | 2020 |
|---|
| 24, Llanfair Road503 m away | 106 m² | 135 m² | +29 m² +27% | 2016 |
|---|
| 47, Pontcanna Street601 m away | 124 m² | 153 m² | +29 m² +23% | 2015 |
|---|
| Regina Villa, Regina Terrace923 m away | 143 m² | 172 m² | +29 m² +20% | 2014 |
|---|
| 13, Daisy Street886 m away | 70 m² | 99 m² | +29 m² +41% | 2011 |
|---|
| 28, Major Road321 m away | 108 m² | 136 m² | +28 m² +26% | 2026 |
|---|
| 16, Lansdowne Road445 m away | 130 m² | 158 m² | +28 m² +22% | 2026 |
|---|
| 11, Hamilton Street593 m away | 136 m² | 164 m² | +28 m² +21% | 2021 |
|---|
| 7, Beda Road374 m away | 94 m² | 122 m² | +28 m² +30% | 2020 |
|---|
| 19, Bartley Wilson Way821 m away | 110 m² | 138 m² | +28 m² +25% | 2020 |
|---|
| 95c, Severn Grove588 m away | 28 m² | 56 m² | +28 m² +100% | 2011 |
|---|
| 18, Glamorgan Street261 m away | 79 m² | 106 m² | +27 m² +34% | 2025 |
|---|
| 16, Romilly Crescent334 m away | 69 m² | 96 m² | +27 m² +39% | 2024 |
|---|
| 38, Lower Cathedral Road918 m away | 54 m² | 81 m² | +27 m² +50% | 2010 |
|---|
| 36, Beda Road447 m away | 54 m² | 81 m² | +27 m² +50% | 2009 |
|---|
| 11, Cumberland Street331 m away | 97 m² | 123 m² | +26 m² +27% | 2021 |
|---|
| 90, Wyndham Crescent284 m away | 63 m² | 89 m² | +26 m² +41% | 2020 |
|---|
| 28, Alexandra Road203 m away | 88 m² | 114 m² | +26 m² +30% | 2017 |
|---|
| 64, Theobald Road439 m away | 91 m² | 117 m² | +26 m² +29% | 2016 |
|---|
| 3, Fields Park Road847 m away | 153 m² | 179 m² | +26 m² +17% | 2011 |
|---|
| 21, Kingsland Road985 m away | 27 m² | 53 m² | +26 m² +96% | 2010 |
|---|
| 11, Bloom Street632 m away | 76 m² | 101 m² | +25 m² +33% | 2025 |
|---|
| 18, Carmarthen Street267 m away | 80 m² | 105 m² | +25 m² +31% | 2024 |
|---|
| 7, Mortimer Road670 m away | 87 m² | 112 m² | +25 m² +29% | 2024 |
|---|
| 62, Kings Road407 m away | 128 m² | 153 m² | +25 m² +20% | 2023 |
|---|
| 52, Beda Road447 m away | 109 m² | 134 m² | +25 m² +23% | 2023 |
|---|
| 16, Telford Street816 m away | 89 m² | 114 m² | +25 m² +28% | 2022 |
|---|
| 14, Cumberland Street331 m away | 62 m² | 87 m² | +25 m² +40% | 2019 |
|---|
| 6, Library Street69 m away | 129 m² | 154 m² | +25 m² +19% | 2018 |
|---|
| 59, Romilly Crescent351 m away | 70 m² | 95 m² | +25 m² +36% | 2018 |
|---|
| 30, Brecon Street527 m away | 100 m² | 125 m² | +25 m² +25% | 2013 |
|---|
| 128, Severn Grove588 m away | 49 m² | 74 m² | +25 m² +51% | 2013 |
|---|
| 73, Kings Road377 m away | 63 m² | 88 m² | +25 m² +40% | 2011 |
|---|
| 2, Church Road147 m away | 129 m² | 153 m² | +24 m² +19% | 2026 |
|---|
| 33b, Fields Park Road847 m away | 52 m² | 76 m² | +24 m² +46% | 2025 |
|---|
| 99, Fairleigh Road865 m away | 83 m² | 107 m² | +24 m² +29% | 2024 |
|---|
| 10, Rawden Place874 m away | 123 m² | 147 m² | +24 m² +20% | 2023 |
|---|
| 4, Rawden Place874 m away | 119 m² | 143 m² | +24 m² +20% | 2023 |
|---|
| 49, Bartley Wilson Way821 m away | 59 m² | 83 m² | +24 m² +41% | 2022 |
|---|
| 4, Cardigan Court360 m away | 46 m² | 70 m² | +24 m² +52% | 2021 |
|---|
| 22, Nesta Road923 m away | 102 m² | 126 m² | +24 m² +24% | 2020 |
|---|
| 51, Plasturton Avenue472 m away | 153 m² | 177 m² | +24 m² +16% | 2017 |
|---|
| 21, Penhill Road724 m away | 62 m² | 86 m² | +24 m² +39% | 2016 |
|---|
| 5, Mortimer Road670 m away | 102 m² | 126 m² | +24 m² +24% | 2011 |
|---|
| 3, Bloom Street632 m away | 71 m² | 94 m² | +23 m² +32% | 2026 |
|---|
| 73, Wells Street658 m away | 90 m² | 113 m² | +23 m² +26% | 2025 |
|---|
| 23, Victoria Avenue995 m away | 89 m² | 112 m² | +23 m² +26% | 2021 |
|---|
| 4, Leckwith Mews545 m away | 141 m² | 163 m² | +22 m² +16% | 2026 |
|---|
| Flat 1, Conway Court, 18, Penhill Road724 m away | 117 m² | 139 m² | +22 m² +19% | 2025 |
|---|
| 11, Leckwith Place502 m away | 94 m² | 116 m² | +22 m² +23% | 2022 |
|---|
| 33, West Lee777 m away | 58 m² | 80 m² | +22 m² +38% | 2021 |
|---|
| 75, Daisy Street983 m away | 69 m² | 91 m² | +22 m² +32% | 2020 |
|---|
| 34, Wyndham Crescent337 m away | 101 m² | 123 m² | +22 m² +22% | 2016 |
|---|
| 16, Conway Road474 m away | 59 m² | 81 m² | +22 m² +37% | 2014 |
|---|
| 1, Egerton Mews584 m away | 87 m² | 109 m² | +22 m² +25% | 2012 |
|---|
| 67, Romilly Crescent351 m away | 16 m² | 38 m² | +22 m² +138% | 2010 |
|---|
| 139, Cathedral Road603 m away | 24 m² | 46 m² | +22 m² +92% | 2009 |
|---|
| 119, Romilly Road742 m away | 15 m² | 37 m² | +22 m² +147% | 2009 |
|---|
| 2, Fairleigh Road928 m away | 107 m² | 128 m² | +21 m² +20% | 2025 |
|---|
| 5, Craddock Street940 m away | 78 m² | 99 m² | +21 m² +27% | 2024 |
|---|
| 18, Vishwell Road987 m away | 101 m² | 122 m² | +21 m² +21% | 2024 |
|---|
| 70, Hamilton Street476 m away | 124 m² | 145 m² | +21 m² +17% | 2023 |
|---|
| 10, Wyndham Place549 m away | 92 m² | 113 m² | +21 m² +23% | 2022 |
|---|
| 489, Cowbridge Road East873 m away | 106 m² | 127 m² | +21 m² +20% | 2022 |
|---|
| 37, Talbot Street538 m away | 136 m² | 157 m² | +21 m² +15% | 2021 |
|---|
| 14, Grosvenor Street646 m away | 46 m² | 67 m² | +21 m² +46% | 2021 |
|---|
| Flat 9, Caernarvon Court, Conway Road591 m away | 44 m² | 65 m² | +21 m² +48% | 2020 |
|---|
| Coach House, 122a, Pembroke Road570 m away | 78 m² | 99 m² | +21 m² +27% | 2019 |
|---|
| 95, Cathedral Road592 m away | 51 m² | 72 m² | +21 m² +41% | 2015 |
|---|
| 6, Ryder Street693 m away | 129 m² | 150 m² | +21 m² +16% | 2015 |
|---|
| 11, Eton Place247 m away | 111 m² | 132 m² | +21 m² +19% | 2014 |
|---|
| 32, Rectory Road337 m away | 102 m² | 123 m² | +21 m² +21% | 2014 |
|---|
| 50, Alexandra Road331 m away | 74 m² | 94 m² | +20 m² +27% | 2026 |
|---|
| 13, Anglesey Street388 m away | 88 m² | 108 m² | +20 m² +23% | 2025 |
|---|
| Apartment 13, Cathedral House, Hamilton Street728 m away | 96 m² | 116 m² | +20 m² +21% | 2025 |
|---|
| Flat 3, 362, Cowbridge Road East775 m away | 40 m² | 60 m² | +20 m² +50% | 2025 |
|---|
| 28, Brecon Street527 m away | 91 m² | 111 m² | +20 m² +22% | 2023 |
|---|
| 74, Llanfair Road636 m away | 112 m² | 132 m² | +20 m² +18% | 2022 |
|---|
| 11, Maldwyn Street802 m away | 120 m² | 140 m² | +20 m² +17% | 2021 |
|---|
| 32, Carmarthen Street276 m away | 76 m² | 96 m² | +20 m² +26% | 2020 |
|---|
| 6, Glamorgan Street Mews278 m away | 54 m² | 74 m² | +20 m² +37% | 2019 |
|---|
| 10, Earle Place218 m away | 113 m² | 133 m² | +20 m² +18% | 2014 |
|---|
| 6, St Johns Crescent219 m away | 35 m² | 55 m² | +20 m² +57% | 2013 |
|---|
| 195, Cathedral Road665 m away | 48 m² | 68 m² | +20 m² +42% | 2009 |
|---|
| 15, Grosvenor Street646 m away | 110 m² | 129 m² | +19 m² +17% | 2026 |
|---|